BE754235A - Circuit de supervision pour lignes telephoniques - Google Patents

Circuit de supervision pour lignes telephoniques

Info

Publication number
BE754235A
BE754235A BE754235DA BE754235A BE 754235 A BE754235 A BE 754235A BE 754235D A BE754235D A BE 754235DA BE 754235 A BE754235 A BE 754235A
Authority
BE
Belgium
Prior art keywords
telephone lines
supervision circuit
supervision
circuit
telephone
Prior art date
Application number
Other languages
English (en)
Inventor
G S Tjaden
Original Assignee
Western Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication date
Publication of BE754235A publication Critical patent/BE754235A/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits
BE754235D 1969-08-05 Circuit de supervision pour lignes telephoniques BE754235A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US84758169A 1969-08-05 1969-08-05

Publications (1)

Publication Number Publication Date
BE754235A true BE754235A (fr) 1970-12-31

Family

ID=25300976

Family Applications (1)

Application Number Title Priority Date Filing Date
BE754235D BE754235A (fr) 1969-08-05 Circuit de supervision pour lignes telephoniques

Country Status (6)

Country Link
US (1) US3622709A (fr)
BE (1) BE754235A (fr)
DE (1) DE2038933A1 (fr)
FR (1) FR2057868A5 (fr)
GB (1) GB1322216A (fr)
NL (1) NL7011277A (fr)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE629064A (fr) * 1962-03-01
US3772477A (en) * 1972-07-17 1973-11-13 Bell Telephone Labor Inc Telephone dial pulse detection circuit
US3819866A (en) * 1972-12-18 1974-06-25 Bell Telephone Labor Inc Light coupled loop current detector
US3825682A (en) * 1973-06-27 1974-07-23 Rca Corp Balanced line driver, line receiver system
US3914556A (en) * 1974-06-12 1975-10-21 Itt On-hook and off-hook detector for telephone switching systems
FR2286573A1 (fr) * 1974-09-24 1976-04-23 Constr Telephoniques Circuit d'exploration pour systeme de commutation
US3939308A (en) * 1974-09-27 1976-02-17 Gte Automatic Electric (Canada) Limited Electronic side of line detector
US3999018A (en) * 1975-03-05 1976-12-21 Stromberg-Carlson Corporation Timer associated with CB relay
US4027109A (en) * 1975-06-27 1977-05-31 Smith Lloyd M Telephone call diverting system
GB1563803A (en) * 1975-11-26 1980-04-02 Post Office Telecommunications transmission and signalling curcuits
US4099032A (en) * 1977-03-25 1978-07-04 Wescom, Inc. Loop current detector
US4166931A (en) * 1978-04-24 1979-09-04 Bell Telephone Laboratories, Incorporated Miniature bridge lifter for telephone lines
CH635216A5 (de) * 1978-10-25 1983-03-15 Hansjoerg Erne Geraet zur ueberwachung des linienstromes in einer telefonleitung.
DE2850929C2 (de) * 1978-11-24 1982-06-09 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zur Unterdrückung von Störspannungseinflüssen bei der Bewertung des Signalzustandes auf Übertragungsleitungen, insbesondere auf Teilnehmeranschlußleitungen in Fernsprechanlagen
JPS5637793A (en) * 1979-09-05 1981-04-11 Hitachi Ltd Loop detecting circuit
US4389543A (en) * 1980-12-18 1983-06-21 Martus Granirer Telephone-activated audio control circuit
US4454477A (en) * 1982-04-28 1984-06-12 At&T Bell Laboratories Loop current detector with threshold setting impedance
EP0201635B1 (fr) * 1985-05-17 1991-12-18 BELL TELEPHONE MANUFACTURING COMPANY Naamloze Vennootschap Circuit de Ligne de télécommunication
DE3525566A1 (de) * 1985-07-15 1987-01-15 Siemens Ag Schaltungsanordnung zur erkennung von erdtastenfunktionen in fernsprechvermittlungsanlagen
EP0759672A1 (fr) * 1995-08-23 1997-02-26 AT&T IPM Corp. Circuit de détection de courant peu invasif

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL106485C (fr) * 1955-11-03
NL220430A (fr) * 1956-12-07

Also Published As

Publication number Publication date
DE2038933A1 (de) 1971-02-18
NL7011277A (fr) 1971-02-09
GB1322216A (en) 1973-07-04
FR2057868A5 (fr) 1971-05-21
US3622709A (en) 1971-11-23

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